//
// Created by jsjxsy on 2022/11/25.
//
#include "06_unit1.c"
#include "07_unit2.c"
void printtest1();
void printtest2();
int main(int argc, char *argv[]) {
  extern int a;
  a = 20;
  printtest1();
  printtest2();
  a = 30;
  printtest1();
  printtest2();
  return 0;
}